After First Vows he was sent to Tullabeg for some Regency, as Prefect of Discipline.He then went to Stonyhurst for three years Philosophy after which he returned to Tullabeg. He spent eight years in total working at Tullabeg, and his friends began to joke him, calling him the “Perpetual Scholastic”! In those days, given the scarcity of men to run the Colleges, if you were good at your job, you risked being penalised by a long stay in the Colleges, before being sent to Theology. However, Patrick never complained, and his sole desire was to do the will of his Superiors.He was eventually sent to St Beuno’s for four years of Theology, and after Ordination, he made Tertianship at Roehampton.

From Ordination to his death he spent his life teaching. He was an excellent Greek scholar, and a first class general teacher. Those who met him were impressed by his charm and he made many friends, and easily. He had a very dry sense of humour, and even when he was in pain himself, his humour never failed him. He was a very honest and straightforward man. He was thought of as a sound Theologian and a very prudent advisor, so his opinions in both Theology and ordinary life were highly respected.

For some years before his death he had been failing notably. So, for health reasons it was decided to send him to Egypt. He spent nine months in Cairo, acting as Chaplain to the English troops, he edified all by his patience with suffering, and by his piety.

The Rector of Collège de la Sainte-Famille, Cairo wrote to the HIB Provincial : “I say nothing of the sweet tender piety of Father Anderson, of his unalterable patience, of his conformity to the will of God. In death he was truly the same holy and humble relisious who so edified us during his sojourn among us. Shortly before he died, he said to me ‘Now I know the folly of those who put off their conversion till the hour of death. I have now but one thought, and even that I can scarcely turn to the subject on which alone I should be fixed’, and he told those around him that he willingly gave up his life for the good of the Egyptian Mission and for the conversion of its people”.He died at Collège de la Sainte-Famille, Cairo, Egypt 29/06/1900